Influence of [Al.sub.2][O.sub.3] content on mechanical properties of silica-based ceramic cores prepared by stereolithography

Silica ceramic cores have played an important part in the manufacture of hollow blades due to their excellent chemical stability and moderate high-temperature mechanical properties. In this study, silica-based ceramics were prepared with [Al.sub.2][O.sub.3] addition by stereolithography, and the inf...

Full description

Saved in:
Bibliographic Details
Published inJournal of advanced ceramics Vol. 10; no. 6; p. 1381
Main Authors Zheng, Wen, Wu, Jia-Min, Chen, Shuang, Wang, Chang-Shun, Liu, Chun-Lei, Hua, Shuai-Bin, Yu, Kang-Bo, Zhang, Jie, Zhang, Jing-Xian, Shi, Yu-Sheng
Format Journal Article
LanguageEnglish
Published Springer 01.12.2021
Subjects
Analysis
Ceramic industry
Ceramic materials
Ceramics
Mechanical properties
Silica
China
Online AccessGet full text

Cover

More Information
Summary:Silica ceramic cores have played an important part in the manufacture of hollow blades due to their excellent chemical stability and moderate high-temperature mechanical properties. In this study, silica-based ceramics were prepared with [Al.sub.2][O.sub.3] addition by stereolithography, and the influence of [Al.sub.2][O.sub.3] content on mechanical properties of the silica-based ceramics was investigated. The [Al.sub.2][O.sub.3] in silica-based ceramics can improve the mechanical properties by playing a role as a seed for the crystallization of fused silica into cristobalite. As a result, with the increase of [Al.sub.2][O.sub.3] content, the linear shrinkage of the silica-based ceramics first decreased and then increased, while the room-temperature flexural strength and the high-temperature flexural strength first increased and then decreased. As the [Al.sub.2][O.sub.3] content increased to 1.0 vol%, the linear shrinkage was reduced to 1.64% because of the blocked viscous flow caused by [Al.sub.2][O.sub.3]. Meanwhile, the room-temperature flexural strength and the high-temperature flexural strength were improved to 20.38 and 21.43 MPa with 1.0 vol% [Al.sub.2][O.sub.3], respectively, due to the increased [alpha]-cristobalite and [beta]-cristobalite content. Therefore, using the optimal content of [Al.sub.2][O.sub.3] in silica-based ceramics can provide excellent mechanical properties, which are suitable for the application of ceramic cores in the manufacturing of hollow blades. Keywords: silica; ceramic core; stereolithography; [Al.sub.2][O.sub.3]; mechanical properties; hollow blades
ISSN:2226-4108
2227-8508
DOI:10.1007/s40145-021-Q513-y